CN103117432B - A kind of harmonic shutter - Google Patents
A kind of harmonic shutter Download PDFInfo
- Publication number
- CN103117432B CN103117432B CN201110365555.2A CN201110365555A CN103117432B CN 103117432 B CN103117432 B CN 103117432B CN 201110365555 A CN201110365555 A CN 201110365555A CN 103117432 B CN103117432 B CN 103117432B
- Authority
- CN
- China
- Prior art keywords
- metal
- cavitg
- inner wire
- frequency modulation
- metal cavitg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of harmonic shutter, comprise a metal cavitg, the inner wire be only connected with metal cavitg inwall in bottom, metal cavitg is inserted inner by metal cavitg outside, wherein frequency modulation metal column is alternately distributed in inner wire both sides, coupling metal column inserts metal cavitg directly over inner wire, and at regular intervals with inner wire.Structure of the present invention is simple, processing assembling is easy, debugging is convenient, cut-off frequecy of passband is high, transition frequency range suppresses precipitous.Be expected to be widely used in the electronic system of each microwave band, particularly the military affairs such as radar, missile guidance, communication and civil area.
Description
Technical field
The present invention relates to harmonic shutter, specifically, relate to a kind of harmonic shutter utilizing ridge waveguide and metal column to form, also can be called band stop filter, low pass filter, trapper.
Background technology
Suppress parasitic passband to be the focus paid close attention in industry in wave filter technology always.The method of traditional suppression parasitic passband comprises employing low pass filter, adopts the forms such as coaxial resonant cavity.The most common to low-pass filter structure comprise the coaxial configuration inner wire and micro-band inner wire two kinds of change in the instantaneous impedance that disk loads.The former has the shortcomings such as complex structure, requirement on machining accuracy are high, support is difficult, transition frequency range suppresses precipitous not, debugging is difficult.The latter has the shortcomings such as the high-end loss of passage is high, power capacity is low, the stopband suppression degree of depth is limited, transition frequency range suppresses precipitous not, cannot finely tune.And cascaded low-pass filter can increase volume, weight and Insertion Loss.And adopt coaxial resonant cavity to suppress parasitic passband, then need loading capacitance, and the support of axial mechanism is difficult.Although the volume-diminished of resonant cavity has the miniaturization utilizing filter, because the Q value of resonant cavity reduces, by Insertion Loss in the band of increase filter.The suspension band line harmonics inhibitor that nearest market occurs, makes transition frequency range suppress steepness to obtain improvement to a certain extent owing to introducing transmission zero.Meanwhile, because signal energy part is distributed in air, the problem that the high-end Insertion Loss of band pass filter passband is high also obtains part and solves.But still there is the shortcomings such as power capacity is low, the stopband suppression degree of depth is limited, cannot finely tune in suspension band line harmonics inhibitor.
Summary of the invention
The object of the present invention is to provide that a kind of structure is simple, processing assembling easily, debugging is convenient, cut-off frequecy of passband is high, transition frequency range suppresses precipitous harmonic shutter.
For achieving the above object, the technical solution used in the present invention is: a kind of harmonic shutter, comprise metal cavitg, inner wire and at least 3 frequency modulation metal columns, metal cavitg is the column shape cavity structure of horizontal positioned, and the axis of metal cavitg is parallel with horizontal line, and described inner wire is the column structure of horizontal positioned, described inner wire is arranged on metal cavitg inside, and the bottom surface of inner wire is connected with metal cavitg bottom interior wall; Frequency modulation metal column inserts in metal cavitg from metal cavitg.
Steepness is suppressed with the stopband improving low pass filter in order to produce transmission zero in the stopband of harmonic shutter, described frequency modulation metal column is arranged alternately in the left and right sides of inner wire along the axis direction of inner wire, and the degree of depth that frequency modulation metal column inserts in metal cavitg is regulated and fixes from metal cavitg.
At inner wire away from there being the some coupling metal columns inserted from metal cavitg in metal cavitg directly over metal cavitg bottom end.
Metal cavitg and inner wire have in the axial direction thereof and bend at any angle.
The axis of described frequency modulation metal column is positioned at more than 2/5 of metal cavitg maximum height in the short transverse of metal cavitg.
The end face that described frequency modulation metal column inserts in metal cavitg is smooth flat.
There is gap between top in described frequency modulation metal column insertion metal cavitg and inner wire, the minimum range in described gap is less than this frequency modulation metal column and is positioned at the sidewall at inner wire place and 1/5 of metal cavitg spacing.
In order to increase the electric capacity between frequency modulation metal column top and metallic inner conductor as far as possible, the diameter of described frequency modulation metal column is greater than 0.4 times of metal cavitg maximum height, and the top end face be less than in frequency modulation metal column insertion metal cavitg and metal column distance.
Described metal cavitg metal cavitg away from above bottom metal cavitg and be highly more than 1/2 cross section be rectangle.
Inner wire is being smooth horizontal plane away from the end face bottom metal cavitg; Inner wire is away from bottom metal cavitg and at the position of metal cavitg height more than 2/5, its inner wire left and right sides are smooth flat.
A kind of harmonic shutter is formed primarily of input/output structure, metal cavitg, inner wire, some frequency modulation metal columns, and described input/output structure can be coaxial-ridge waveguide transformational structure, waveguide-ridge waveguide transformational structure, micro-band-ridge waveguide transformational structure.Described input/output structure inner wire and frequency modulation metal column all run through metal cavitg outer wall and extend into the outer pars intramuralis of cavity, and described frequency modulation metal column extends into metal cavitg position points to inner wire, and frequency modulation metal column arranges along the axis of inner wire.
The described left and right sides having at least 3 adjacent frequency modulation metal columns to be arranged in sequence alternately in inner wire axis, and the axis of frequency modulation metal column is parallel to each other.
The top end diameter that described frequency modulation metal column extends into metal cavitg position is R, and metal cavitg is L perpendicular to the width dimensions of this frequency modulation metal column axis and inner wire axis both direction at the same time, described R >=30%L.
Be less than or equal to 3 times of this frequency modulation metal column top end diameter perpendicular to the air line distance of adjacent two frequency modulation metal column axis simultaneously.
Have at least 3 adjacent frequency modulation metal columns to extend between the top at metal cavitg position and metallic inner conductor and there is gap, and this gap is less than or equal to 1/5 of this frequency modulation metal column place inner wire sidewall and metal cavitg spacing.
The metal cavitg of inner wire is rectangle at metal cavitg height more than 1/2, and the axis of frequency modulation metal column is vertical with a face of metallic inner conductor.
Suppressing steepness in order to produce transmission zero in the stopband of harmonic shutter with the stopband improving low pass filter, inner wire axis having the frequency modulation metal column of heterogeneous neighbour be as far as possible arranged in sequence alternately in the both sides of inner wire.And the axis of adjacent two frequency modulation metal columns is parallel to each other.
In order to increase the electric capacity between frequency modulation metal column top and metallic inner conductor as far as possible, the top end diameter that described frequency modulation metal column extends into metal cavitg position is R, metal cavitg is L perpendicular to the width dimensions of this frequency modulation metal column axis and metal cavitg axis both direction at the same time, described R >=40%L.
In order to increase the electric capacity between frequency modulation metal column top and metallic inner conductor as far as possible, exist between as far as possible many frequency modulation metal columns and metallic inner conductor be less than or equal to frequency modulation metal column place inner wire sidewall and metal cavitg spacing 1/5 gap, and described metal cavitg is rectangle at metal cavitg height more than 1/2, and described inner wire top is a part for horizontal plane, the left surface of inner wire at metal cavitg height more than 1/2 position and right flank are a part for plane.
In order to the miniaturization of device, harmonic shutter can be set to curved shape.The axis bending of inner wire is " U " shape, serpentine or straight line or their combination.
The operation principle of harmonic shutter can be described below.
First, electromagnetic wave signal to be input to from one end of inner wire inner wire and to transmit along inner wire.When signal runs into any frequency modulation metal column, a part continues transmission along inner wire, and another part is reflected back.In certain frequency, cancelled out each other by the signal that all frequency modulation metal columns reflect, they and be zero, most of signal of this frequency transmits along inner wire.This frequency is in the passband of low pass filter.In certain frequency, mutually superposed by the signal that all frequency modulation metal columns reflect, most of signal of this frequency is reflected.This frequency is in the stopband of low pass filter.
In a word, adopt frequency modulation metal column to realize capacitive load, can finely tune low pass filter easily.Adopt to point on basis that contrary adjacent frequency modulation metal column can realize capacitive load and realize cross-couplings, realize some transmission zeros outward harmonic shutter passband is high-end, greatly improve the Out-of-band rejection steepness of harmonic shutter.
The invention has the advantages that, structure is simple, processing assembling easily, debugging is convenient, cut-off frequecy of passband is high, transition frequency range suppresses precipitous.Harmonic shutter of the present invention is expected to be widely used in the electronic system of each microwave band, particularly the military affairs such as radar, missile guidance, communication and civil area.
Accompanying drawing explanation
Fig. 1 is the front view of the embodiment of the present invention one.
Fig. 2 is the A-A profile of the embodiment of the present invention one.
Fig. 3 is the main diagram of the embodiment of the present invention two.
Fig. 4 is the A-A profile of the embodiment of the present invention two.
Fig. 5 is the main diagram of the embodiment of the present invention three.
Fig. 6 is the main diagram of the embodiment of the present invention four.
Number in the figure is expressed as: 1, metal cavitg; 2, inner wire; 3, frequency modulation metal column, 4, coupling metal column.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment one
In fact as shown in Figure 1, 2, a kind of harmonic shutter, comprise metal cavitg 1, inner wire 2 and at least 3 frequency modulation metal columns 3, metal cavitg 1 is the column shape cavity structure of horizontal positioned, and the axis of metal cavitg 1 is parallel with horizontal line, and described inner wire 2 is the column structure of horizontal positioned, it is inner that described inner wire 2 is arranged on metal cavitg 1, and the bottom surface of inner wire 2 is connected with metal cavitg 1 bottom interior wall; Frequency modulation metal column 3 inserts in metal cavitg 1 from metal cavitg 1.
Steepness is suppressed with the stopband improving low pass filter in order to produce transmission zero in the stopband of harmonic shutter, described frequency modulation metal column 3 is arranged alternately in the left and right sides of inner wire 2 along the axis direction of inner wire 2, and the degree of depth that frequency modulation metal column 3 inserts in metal cavitg 1 can be regulated and fix from metal cavitg 1.
The axis of described frequency modulation metal column 3 is positioned at more than 2/5 of metal cavitg 1 maximum height in the short transverse of metal cavitg 1.
Described frequency modulation metal column 3 end face inserted in metal cavitg 1 is smooth flat.
Described frequency modulation metal column 3 inserts between top in metal cavitg 1 and inner wire 2 exists gap, and the minimum range in described gap is less than this frequency modulation metal column 3 and is positioned at the sidewall at inner wire 2 place and 1/5 of metal cavitg 1 spacing.
In order to increase the electric capacity between frequency modulation metal column 3 top and metallic inner conductor 2 as far as possible, the diameter of described frequency modulation metal column 3 is greater than 0.4 times of metal cavitg 1 maximum height.
At inner wire 2 away from the some coupling metal columns 4 had directly over metal cavitg 1 bottom end from metal cavitg 1 in insertion metal cavitg 1.
Have in the axial direction at metal cavitg 1 and inner wire 2 and bend at any angle.
Described metal cavitg 1 metal cavitg 1 away from above bottom metal cavitg 1 and be highly more than 1/2 cross section be rectangle.
Inner wire 2 is being smooth horizontal plane away from the end face bottom metal cavitg 1; Inner wire 2 away from bottom metal cavitg 1 and metal cavitg 1 height more than 2/5 position, its inner wire 2 left and right sides are smooth flat.
Embodiment two
As shown in Figures 3 and 4, this embodiment is with the difference of embodiment one: the shape of cross section of described inner wire 2 is rectangle, and the axis shape of metal cavitg 1 and inner wire 2 is U-shaped, and does not insert coupling metal column 4 directly over described inner wire 2.
Embodiment three
As shown in figures 2 and 5, this embodiment is with the difference of embodiment one: the shape of cross section of described inner wire 2 is T-shaped.
Embodiment four
As seen in figs, the difference of this embodiment and embodiment one is: the cross-sectional upper part of described inner wire 2 after extending to two ends to the bottom bend of metal cavitg 1, and bending part is parallel with the sidewall of metal cavitg, and directly over described inner wire 2, do not insert coupling metal column 4.
Claims (6)
1. a harmonic shutter, it is characterized in that, comprise metal cavitg (1), inner wire (2) and at least 3 frequency modulation metal columns (3), the column shape cavity structure that metal cavitg (1) is horizontal positioned, the axis of metal cavitg (1) is parallel with horizontal line, the column structure that described inner wire (2) is horizontal positioned, it is inner that described inner wire (2) is arranged on metal cavitg (1), and the bottom surface of inner wire (2) is connected with metal cavitg (1) bottom interior wall; Frequency modulation metal column (3) inserts in metal cavitg (1) from the left and right sides metal cavitg (1);
Described frequency modulation metal column (3) is arranged alternately in the left and right sides of inner wire (2) along the axis direction of inner wire (2), and the degree of depth that frequency modulation metal column (3) inserts in metal cavitg (1) is regulated and fixes from metal cavitg (1); The axis of described frequency modulation metal column (3) is positioned at more than 2/5 of metal cavitg (1) maximum height in the short transverse of metal cavitg (1); The diameter of described frequency modulation metal column (3) is greater than 0.4 times of metal cavitg (1) maximum height.
2. harmonic shutter according to claim 1, it is characterized in that, at inner wire (2) away from there being some coupling metal columns (4) of to insert from metal cavitg (1) in metal cavitg (1) directly over metal cavitg (1) bottom end, and the distance that described coupling metal column (4) inserts top end face in metal cavitg (1) and inner wire (2) is greater than frequency modulation metal column (3) inserts top end face in metal cavitg (1) and metal column (2) distance.
3. harmonic shutter according to claim 1, is characterized in that, the top end face that described frequency modulation metal column (3) is inserted in metal cavitg (1) is smooth flat.
4. harmonic shutter according to claim 1, it is characterized in that, there is gap between top in described frequency modulation metal column (3) insertion metal cavitg (1) and inner wire (2), the minimum range in described gap is less than the sidewall at this frequency modulation metal column (3) place metal cavitg (1) and 1/5 of inner wire (2) spacing.
5. harmonic shutter according to claim 1, is characterized in that, described metal cavitg (1) this metal cavitg (1) height 1/2 with the cross section of upper part for rectangle.
6. harmonic shutter as claimed in any of claims 1 to 5, is characterized in that, described inner wire (2) this inner wire (2) height 1/2 with the cross section of upper part for rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110365555.2A CN103117432B (en) | 2011-11-17 | 2011-11-17 | A kind of harmonic shutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110365555.2A CN103117432B (en) | 2011-11-17 | 2011-11-17 | A kind of harmonic shutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103117432A CN103117432A (en) | 2013-05-22 |
| CN103117432B true CN103117432B (en) | 2015-07-29 |
Family
ID=48415742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110365555.2A Active CN103117432B (en) | 2011-11-17 | 2011-11-17 | A kind of harmonic shutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103117432B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704923A1 (en) * | 1994-09-28 | 1996-04-03 | ANT Nachrichtentechnik GmbH | Comb filter |
| JP2005203884A (en) * | 2004-01-13 | 2005-07-28 | Mitsubishi Electric Corp | Directional coupler and manufacturing method therefor |
| CN1950971A (en) * | 2004-05-12 | 2007-04-18 | 菲尔特朗尼克科姆特克有限公司 | Band stop filter |
| CN101471470A (en) * | 2007-12-27 | 2009-07-01 | 奥雷通光通讯设备（上海）有限公司 | Band-stop filter |
| CN102074775A (en) * | 2011-01-24 | 2011-05-25 | 成都赛纳赛德科技有限公司 | Band elimination filter |
| CN201985227U (en) * | 2011-04-06 | 2011-09-21 | 成都赛纳赛德科技有限公司 | Compact type comb-shaped filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601202U (en) * | 2009-12-21 | 2010-10-06 | 成都赛纳赛德科技有限公司 | Dual-polarized filter |
| CN202564512U (en) * | 2011-11-17 | 2012-11-28 | 成都赛纳赛德科技有限公司 | Harmonic suppressor |
-
2011
- 2011-11-17 CN CN201110365555.2A patent/CN103117432B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704923A1 (en) * | 1994-09-28 | 1996-04-03 | ANT Nachrichtentechnik GmbH | Comb filter |
| JP2005203884A (en) * | 2004-01-13 | 2005-07-28 | Mitsubishi Electric Corp | Directional coupler and manufacturing method therefor |
| CN1950971A (en) * | 2004-05-12 | 2007-04-18 | 菲尔特朗尼克科姆特克有限公司 | Band stop filter |
| CN101471470A (en) * | 2007-12-27 | 2009-07-01 | 奥雷通光通讯设备（上海）有限公司 | Band-stop filter |
| CN102074775A (en) * | 2011-01-24 | 2011-05-25 | 成都赛纳赛德科技有限公司 | Band elimination filter |
| CN201985227U (en) * | 2011-04-06 | 2011-09-21 | 成都赛纳赛德科技有限公司 | Compact type comb-shaped filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103117432A (en) | 2013-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106898849B (en) | Dielectric waveguide filter with cross coupling structure | |
| JP6054485B2 (en) | Radio frequency filter using notch structure | |
| CN102306859B (en) | Low pass filter | |
| US10116026B2 (en) | Coaxial filter having first to fifth resonators, where the fourth resonator is an elongated resonator | |
| CN203225324U (en) | X-frequency band-waveguide bandstop harmonic filter | |
| CN103107403B (en) | Loaded power divider | |
| CN105186079A (en) | Dual-band waveguide filter | |
| CN101604783A (en) | Compact type microwave cavity | |
| CN103117432B (en) | A kind of harmonic shutter | |
| CN202564512U (en) | Harmonic suppressor | |
| CN205646090U (en) | A two gradual change transition waceguides that is arranged in millimeter to involve more high frequency point coupled -cavity TWT | |
| CN202333095U (en) | Band-stop filter | |
| CN202142625U (en) | Low-pass filter | |
| CN202333090U (en) | Miniature comb filter | |
| CN202217759U (en) | Band elimination filter for inhibiting higher-order modes | |
| CN103117433B (en) | Miniaturization band-pass filter | |
| CN101719577A (en) | Broadband dual-mode filter | |
| CN202405398U (en) | Miniature band-pass filter | |
| CN103117434A (en) | Band rejection filter | |
| CN103311607A (en) | Low-pass filter with changeable cavity width | |
| CN102013539A (en) | Asymmetric formal coupling cascade filter capable of realizing favorable harmonic suppression response | |
| CN110911791B (en) | High-rectangular-coefficient waveguide band-pass filter and design method thereof | |
| CN103311606B (en) | A kind of low pass filter based on helical wire | |
| CN103311605B (en) | A kind of low pass filter | |
| CN102306858B (en) | Low pass filter with cross coupling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |